package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 课程模块的实现类
 */
public class CourseDaoImpl implements CourseDao {

    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QeryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql,判断是否删除 取出is_del=0的数据
            String sql = "SELECT \n" +
                    " id,\n" +
                    " course_name,\n" +
                    " price,\n" +
                    " sort_num,\n" +
                    " STATUS\n" +
                    " FROM course WHERE is_del=?";
            //3.执行查询
            List<Course> curseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
            return curseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //根据条件查询课程信息
    @Override
    public List<Course> findByCourSeNameAndStatus(String courseName, String status) {
        try {
            //1.创建QeryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql 当前的查询为多条件不定向查询
            //2.1 创建StringBuffer 对象，将sql字符串添加进缓冲区
            StringBuffer sb = new StringBuffer("SELECT id,course_name,price,sort_num,STATUS from course WHERE 1=1 and is_del = ?");
            //2.2创建list集合 保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);
            //2.3判断传入的参数是否为空
            if (courseName != null && courseName != "") {
                sb.append(" AND course_name LIKE ?");
                //like 查询需要进行拼接
                courseName = "%" + courseName + "%";
                //将条件放入list集合
                list.add(courseName);
            }
            System.out.println(sb);
            if (status != null && status != null) {
                sb.append(" AND STATUS = ?");
                //将status 转换为 int
                int i = Integer.parseInt(status);
                list.add(i);
            }

            //执行查询
            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            //返回结果
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            //1.创建QeryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写sql
            String sql = "INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);";

            //3.准备参数
            Object[] param = {course.getCourse_name(), course.getBrief(), course.getTeacher_name(), course.getTeacher_info(), course.getPreview_first_field(),
                    course.getPreview_second_field(), course.getDiscounts(), course.getPrice(), course.getPrice_tag(), course.getShare_image_title(),
                    course.getActual_sales(), course.getShare_description(), course.getCourse_description(), course.getCourse_img_url(),
                    course.getStatus(), course.getCreate_time(), course.getUpdate_time()};

            //执行插入操作
            int update = qr.update(sql, param);
            return update;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }

    //根据ID查询课程信息
    @Override
    public Course findCourseById(int id) {

        try {
            //1.创建QeryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "select \n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "status\n" +
                    "from course where id=?;";

            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ? \n" +
                    "WHERE id = ?";

            Object[] param = {course.getCourse_name(), course.getBrief(), course.getTeacher_name(), course.getTeacher_info(),
                    course.getPreview_first_field(), course.getPreview_second_field(), course.getDiscounts(), course.getPrice(),
                    course.getPrice_tag(), course.getShare_image_title(), course.getShare_title(), course.getShare_description(),
                    course.getCourse_description(), course.getCourse_img_url(), course.getUpdate_time(), course.getId()};

            int update = qr.update(sql, param);
            return update;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //修改课程状态
    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET STATUS=?,update_time=? WHERE id=?";

            Object[] param = {course.getStatus(), course.getUpdate_time(), course.getId()};

            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }


}
